Wikipedia

Some topics or cameras are covered in both Wikipedia and Camera-wiki.org; but Wikipedia has a notability requirement which disqualifies many topics or brands from inclusion there.

Flickr

The photo-sharing service Flickr has a number of specialized features which may be of interest to photographers and camera collectors:

There are thousands of special-interest Flickr groups, covering many topics; these include users of particular cameras, films, or processing techniques—even ones dedicated to a single particular lens.

It is possible to make a keyword search of all Flickr's photos, to see images of (or images made with) particular pieces of photographic gear.

You may also search camera-wiki.org's own Flickr pool, a selection of ~45,000 equipment-related images (only one other pool of photo-gear images is larger in size).

The EXIF data encoded in digital images makes it possible for Flickr's Camera Finder to show a selection of images taken with practically any model of digital camera in existence, and thus examine their image properties.